deviceIPMaskList populates subnet masks for IPv4 but not IPv6 addresses


Article ID: 209668


Updated On:


CA Spectrum


At Charter they are using deviceIPMaskList to get the subnet mask of the primary IPv4 IP.   This works fine for IPv4.  However, the entries for IPv6 have blank subnet masks

Here is an example of the attribute and the lack of IPv6 masks:

It looks to work like the following:

First number indicates whether it is IPv6 or IPv4:


16 – Ipv6

4 – ipV4


The next 16 digits represents the Address itself if ipv6 (indicated by the 16 above)


254: 0xFE

128: 0x80


0: 0x0

0: 0x0


0: 0x0

0: 0x0


0: 0x0

0: 0x0


42: 0x2A

138: 0x8A


28:  0x1C

255: 0xFF


254: 0xFE

195: 0xC3


170: 0xAA

193: 0xC1



Append these together for the following IPv6 Address:  FE80:0000:0000:0000:2A8A:1CFF:FEC3:AAC1



Release : 20.2

Component : Spectrum Core / SpectroSERVER


This will be fixed in a future release of Spectrum.  

Additional Information

Defect DE495527